# Biogen (BIIB): value investors who own it | moatshark

1 value investor held Biogen in their Q3 2026 13F, led by Horizon Kinetics. See who bought, sold and how ownership has changed by quarter.

## 13F holders

| Manager | Portfolio | Value | Change | Quarters held |
| --- | --- | --- | --- | --- |
| Horizon Kinetics | 0.0% | $589k | Trimmed -4.6% | 30 |

## Directors buying and selling (Form 4, last 12 months)

| Date | Who | Role | Bought or sold | Shares | Value |
| --- | --- | --- | --- | --- | --- |
| 2026-08-04 | Minor Lloyd | Director | Sold | 593 | $119k |
| 2026-08-03 | Minor Lloyd | Director | Sold | 593 | $121k |

Source: SEC filings, via moatshark (https://www.moatshark.com/s/biib). Values traded and returns are estimates. Not investment advice. Built 2026-10-21.